Patents by Inventor Shenjun Dai

Shenjun Dai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Supported Mo—O—K—MeOcatalyst for the synthesis of methanethiol from high HS-containing syngas
    Patent number: 9409153
    Abstract: This invention is related to a preparation method of a supported catalyst Mo—O—K-MexOy for the synthesis of methanethiol from H2S-containing syngas. The catalyst comprises of an active component of Mo—O—K-based species, an active promoter and a support denoted as metal (or metals)-carrier. The support is prepared by electroless plating method in such a way that the metal or metals chosen are plated onto the surface of the carrier. Transition metal, especially Fe, Co or Ni are selected to be the plating metal, while SiO2, Al2O3 or TiO2 are selected to be carrier. The catalyst thus prepared is found to be efficient for the synthesis of methanethiol from H2S-containing syngasor carbon oxides/hydrogen mixtures, especially regarding a minor formation of the by-product CO2.
    Type: Grant
    Filed: November 28, 2008
    Date of Patent: August 9, 2016
    Assignee: EVONIK DEGUSSA GMBH
    Inventors: Yiquan Yang, Yingjuan Hao, Aiping Chen, Qi Wang, Lingmei Yang, Qiaoling Li, Shenjun Dai, Weiping Fang, Jan-Olaf Barth, Christoph Weckbecker, Klaus Huthmacher
  • Process for the manufacture of methylmercaptan
    Patent number: 7833929
    Abstract: The present invention refers to a continuous process for the manufacture of methyl mercaptan using Mo—O—K-based catalysts. It is further described that the total selectivity of methylmercaptan can be increased by at least 1% by lowering the total gas hourly space velocity. The invention further refers to a process for the preparation of a solid, preformed catalyst system.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: November 16, 2010
    Assignee: Evonik Degussa GmbH
    Inventors: Yiquan Yang, Qi Wang, Renchun Lin, Hongbin Zhang, Youzhu Yuan, Weiping Fang, Quanxing Zheng, Shenjun Dai, Xingguo Yan, Aiping Chen, Jan-Olaf Barth, Christoph Weckbecker, Klaus Huthmacher, Hubert Redlingshöfer, Sabine Ackermann
  • SUPPORTED MO-O-K-MExOy CATALYST FOR THE SYNTHESIS OF METHANETHIOL FROM HIGH H2S-CONTAINING SYNGAS
    Publication number: 20100286448
    Abstract: This invention is related to a preparation method of a supported catalyst Mo—O—K-MexOy for the synthesis of methanethiol from H2S-containing syngas. The catalyst comprises of an active component of Mo—O—K-based species, an active promoter and a support denoted as metal (or metals)-carrier. The support is prepared by electroless plating method in such a way that the metal or metals chosen are plated onto the surface of the carrier. Transition metal, especially Fe, Co or Ni are selected to be the plating metal, while SiO2, Al2O3 or TiO2 are selected to be carrier. The catalyst thus prepared is found to be efficient for the synthesis of methanethiol from H2S-containing syngasor carbon oxides/hydrogen mixtures, especially regarding a minor formation of the by-product CO2.
    Type: Application
    Filed: November 28, 2008
    Publication date: November 11, 2010
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Yiquan Yang, Yingjuan Hao, Aiping Chen, Qi Wang, Lingmei Yang, Qiaoling Li, Shenjun Dai, Weiping Fang, Jan-Olaf Barth, Christoph Wecbecker, Klaus Hutmacher
  • PROCESS FOR THE MANUFACTURE OF METHYLMERCAPTAN
    Publication number: 20100041548
    Abstract: The present invention refers to a continuous process for the manufacture of methyl mercaptan using Mo—O—K-based catalysts. It is further described that the total selectivity of methylmercaptan can be increased by at least 1% by lowering the total gas hourly space velocity. The invention further refers to a process for the preparation of a solid, preformed catalyst system.
    Type: Application
    Filed: July 24, 2009
    Publication date: February 18, 2010
    Inventors: Yiquan YANG, Qi Wang, Renchun Lin, Hongbin Zhang, Youzhu Yuan, Weiping Fang, Quanxing Zheng, Shenjun Dai, Xingguo Yan, Aiping Chen, Jan-Olaf Barth, Christoph Weckbecker, Klaus Huthmacher, Hubert Redlingshöfer, Sabine Ackermann
  • Process for the manufacture of methylmercaptan
    Patent number: 7569731
    Abstract: The present invention refers to a continuous process for the manufacture of methyl mercaptan using Mo—O—K-based catalysts. It is further described that the total selectivity of methylmercaptan can be increased by at least 1% by lowering the total gas hourly space velocity. The invention further refers to a process for the preparation of a solid, preformed catalyst system.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: August 4, 2009
    Assignee: Degussa AG
    Inventors: Yiquan Yang, Qi Wang, Renchun Lin, Hongbin Zhang, Youzhu Yuan, Weiping Fang, Quanxing Zheng, Shenjun Dai, Xingguo Yan, Aiping Chen, Jan-Olaf Barth, Christoph Weckbecker, Klaus Huthmacher, Hubert Redlingshöfer, Sabine Ackermann
  • PROCESS FOR THE MANUFACTURE OF METHYMERCAPTAN
    Publication number: 20070213564
    Abstract: The present invention refers to a continuous process for the manufacture of methyl mercaptan using Mo-O—K-based catalysts. It is further described that the total selectivity of methylmercaptan can be increased by at least 1% by lowering the total gas hourly space velocity. The invention further refers to a process for the preparation of a solid, preformed catalyst system.
    Type: Application
    Filed: September 29, 2004
    Publication date: September 13, 2007
    Inventors: Yiquan Yang, Qi Wang, Renchun Lin, Hongbin Zhang, Youzhu Yuan, Weiping Fang, Quanxing Zheng, Shenjun Dai, Xingguo Yan, Aiping Chen, Jan-Olaf Barth, Christoph Weckbecker, Klaus Huthmacher, Hubert Redlingshofer, Sabine Ackermann